A blonde, brunnet, and redhead where running from the cops.
They see three potatoe sacks on the side of the road and they jump in them.

The cops find the sacks and kicks the brunnet and she barks like a dog so the cops think its a dog and moves on.

The cop then kicks the redhead and she meows like a cat so he thinks its a cat and moves on.

The blonde is starting to catch on now. So th cop kicks the blonde and she says, "potatoe"